Revert of DevTools: Split NetworkPanel.js (patchset #5 id:80001 of https://codereview.chromium.org/722683003/)

Reason for revert:
Don't overwrite files.

Original issue's description:
> DevTools: Split NetworkPanel.js
> 
> BUG=
> 
> Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=185306

TBR=vsevik@chromium.org,apavlov@chromium.org,eustas@chromium.org
NOTREECHECKS=true
NOTRY=true
BUG=

Review URL: https://codereview.chromium.org/730463002

git-svn-id: svn://svn.chromium.org/blink/trunk@185358 bbb929c8-8fbe-4397-9dbb-9b2b20218538
DevTools: Fix wrong pause reason when stepping into an event listener.

On StepInto we should not show "Paused on Event Listener".
The corresponding breakpoint may not even be active, so this status looks quite confusing.

BUG=432468
R=vsevik, yurys

Review URL: https://codereview.chromium.org/723543002

git-svn-id: svn://svn.chromium.org/blink/trunk@185362 bbb929c8-8fbe-4397-9dbb-9b2b20218538